Reaktion #86296

ord-0f797ca77f204f539ca8b372cb494e57

Reaktionsgleichung

CC(=O)OCC(=O)[C@H]1[C@H](C)CC2C3CCC4=CC(=O)CC[C@]4(C)C3=CC[C@@]21C
2-oxo-2-((10S,13S,16R,17S)-10,13,16-trimethyl-3-oxo-2,3,6,7,8,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethyl acetate
O=C([O-])[O-].[K+].[K+]
potassium carbonate
Cl
HCl
→
C[C@@H]1CC2C3CCC4=CC(=O)C=C[C@]4(C)C3=CC[C@]2(C)[C@H]1C(=O)CO
product
Ausbeute 37.3%
C[C@@H]1CC2C3CCC4=CC(=O)C=C[C@]4(C)C3=CC[C@]2(C)[C@H]1C(=O)CO
(10S,13S,16R,17S)-17-(2-hydroxyacetyl)-10,13,16-trimethyl-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-3-one
Ausbeute 37.3%

Edukte

CC(=O)OCC(=O)[C@H]1[C@H](C)CC2C3CCC4=CC(=O)CC[C@]4(C)C3=CC[C@@]21C
2-oxo-2-((10S,13S,16R,17S)-10,13,16-trimethyl-3-oxo-2,3,6,7,8,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethyl acetate
O=C([O-])[O-].[K+].[K+]
potassium carbonate
Cl
HCl

Reagenzien

Keine

Lösungsmittel

ClCCl
methylene chloride
CO
methanol

Reaktionsbedingungen

Temperatur
5°CELSIUS
Detaillierte Bedingungen
See reaction.notes.procedure_details.

Aufarbeitung

  1. 1
    Temperaturcooled in an ice bath
  2. 2
    Einengenconcentrated
  3. 3
    SonstigeAfter partitioning between water and methylene chloride
  4. 4
    Trocknenthe product solution was dried over anhydrous magnesium sulfate
  5. 5
    Filtrationfiltered
  6. 6
    Sonstigeevaporated
  7. 7
    SonstigeCrystallization from ethyl acetate

Vorschrift

A solution of 2-oxo-2-((10S,13S,16R,17S)-10,13,16-trimethyl-3-oxo-2,3,6,7,8,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethyl acetate (1.0 g, 2.6 mM) in methylene chloride (5 mL) and methanol (15 mL) was put under an inert atmosphere and cooled in an ice bath. 1 mL of 1 M aqueous potassium carbonate was added by syringe. The reaction was stirred at 5° C. for 2 h. The reaction was then neutralized with 1N HCl and concentrated. After partitioning between water and methylene chloride, the product solution was dried over anhydrous magnesium sulfate, filtered and evaporated. Crystallization from ethyl acetate yielded a first crop of 0.33 g product. NMR (500 MHz, CDCl3, TMS): δ 0.67 (s, 3H), 1.01 (d, 3H, J=7 Hz), 1.13 (m, 1H), 1.33 (s, 3H), 1.47-1.80 (m, 3, H), 2.00 (m, 1H), 2.06-2.24 (m, 6H), 2.37 (d, 1H), 2.45-2.60 (m, 3H), 2.82 (m, 1H), 3.30 (m, 1H), 4.20 (m, 2H), 5.50 (d, 1H, J=5 Hz), 5.76 (s, 1H).

Quelle

DOI: 10.6084/m9.figshare.5104873.v1Patent: US09434758B2uspto-grants-2016_09